In any case, it’s about how the word is normally used. In normal language you never say something like “those two instants are three hours apart”, or “three hours passed between the two instants”. In contrast, you would say something like that with “points in time”. For example. one can say “this was observed at two different points in time”. Nobody would say “this was observed at two different instants”.
In any case, it’s about how the word is normally used. In normal language you never say something like “those two instants are three hours apart”, or “three hours passed between the two instants”. In contrast, you would say something like that with “points in time”. For example. one can say “this was observed at two different points in time”. Nobody would say “this was observed at two different instants”.